Round cast iron surface plate is the basic and necessary tool and measuring instrument in the mechanical manufacturing industry. It has the following uses:

1)      It is used as the reference plane in all kinds of inpections and precision measurements;

2)      It is used as the measuring basis in the inspection of the machine tools and other mechanical equipments;

3)      It is used to check the performance deviations and the dimensional accuracy of the mechanical parts;

4)      It is used to make the close marking;

The specification or size of the product will be decided according to the user's requirement.

The material of the product is high strength cast iron HT20-40, and the hardness of its working surface is HB770-240. After two times of treatments (the artificial annealing at the temperature of 600℃~700 ℃ and 2~8 years of natural aging treatment), the product has a good performance of a abrasion resistance and a constant stable accuracy.

In accordance with the state standard, there are 4 grades of the accuracy: Grade 0, Grade 1, Grade2 and Grade3.